Watch out! New Study Says Too Much Sleep May Be Linked to Heart Attacks


The portal Journal of the Heart Eurpean published a study that reveals the cardiovascular risks presented by people who sleep more than 8 hours.

The American Academy of Sleep Medicine and the Sleep Research Society recommend that the ideal sleep duration for adults is 7 hours per night. However, it is unclear whether excessive sleep duration or daytime naps may expose people to an increased risk of CV death and disease.

In the study, they investigated the association of estimated self-reported durations of total daily sleep and daytime naps with deaths and major QOL events in the cohort study. The Urban Urban Prospective Epidemic (PURE), which included 116,632 participants, from seven international regions followed by an average of 7.8 years.

The results

The study found that an estimated total sleep duration of 6 to 8 hours per day was associated with reduced risk of death and major cardiovascular events. In addition to sleep duration, daytime naps were associated with an increased risk of CV events and greater deaths in those with more than six hours of nighttime sleep, but not in those who sleep less than six hours a night.

These findings are consistent with recent meta-analyzes that demonstrated a U-shaped association between increased CV risk and daytime naps and sleep duration. However, this study may help to generalize the results for different ethnic groups and geographic regions. Due to its strong and excellent international prospective design. In addition, it presents evidence of an increased CV risk associated with daytime naps in subjects with sufficient sleep duration at night.

This study provides important epidemiological information, but the causal factors that explain the associations described with higher CV risk remain speculative (household figure).

Case among elderly people

Among adults, sleep disorders and sleep-related symptoms such as daytime sleepiness, nocturia, nocturnal dyspnea and morning headache are common problems and are often associated with cardiovascular disease, lack of medication adherence, heart disease, and all-cause mortality.

Daytime naps may represent a physiological response to disturbed sleep related illness, even in people with normal sleep duration. In this study, the group with the longest sleep duration (10 hours) had a relatively higher prevalence of cardiovascular risk factors and the highest proportion of children who took the day (71.6%), almost triple the group of children. (6-8 h), who had only 27.4% of participants who reported naps during the day.

Relationship between daytime siesta and CV events

This may potentially indicate that undiagnosed subclinical CV disease may explain part of the association between daytime nap and major cardiovascular events in patients with sufficient sleep duration at night. Interestingly, in those with short duration of nocturnal sleep, daytime naps may represent a compensatory mechanism for sleep and discharge deficits and therefore were not associated with a higher CV risk.

Conclusions not very clear

In others, daytime naps may be related to cultural factors and habits, as shown by the wide intra-regional variation in the naps reported in this study. If "compensatory naps" and "habitual naps" are associated with a comparable CV risk regardless of the cause of the naps, it remains uncertain and has not been further investigated in the present study.


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